Coupler for bucket excavators



FIG. 1 is a top right side perspective view of a coupler for bucket excavators, showing our new design;

FIG. 2 is a top rear left side perspective view thereof;

FIG. 3 is a left side view;

FIG. 4 is a top plan view;

FIG. 5 is a front elevation;

FIG. 6 is a rear elevation;

FIG. 7 is a bottom plan view with parts removed for clarity; and,

FIG. 8 is a bottom front right side perspective view with parts removed for clarity. 

The ornamental design for a coupler for bucket excavators, as shown and described. 